Proximity sensor for a graphical user interface navigation button

a technology of proximity sensor and navigation button, which is applied in the direction of electric digital data processing, telephone communication, instruments, etc., can solve problems such as subject to wear and tear, and achieve the effect of facilitating the operation of the graphical user interface navigation button, and facilitating the navigation of the graphical user interfa

Inactive Publication Date: 2007-03-01
AVAGO TECH INT SALES PTE LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0003] In a first form of the present invention, a proximity sensor for facilitating an operation of a graphical user interface navigation button comprises an infrared radiation emitter, an infrared radiation sensor and an infrared radiation source differentiator. The infrared radiation emitter emits a navigation infrared radiation. The infrared radiation sensor is positioned relative to the infrared radiation emitter to sense a reflection of the navigation infrared radiation in a navigation direction corresponding to the infrared radiation sensor. The infrared radiation source differentiator is operable to provide a navigation mode signal indicative of at least one of a sensing by the infrared radiation sensor of a reflection of the navigation infrared radiation sensor in the navigation direction corresponding to the infrared radiation sensor by a navigation object proximate the infrared radiation emitter and the infrared, and a sensing by the infrared radiation sensor of ambient infrared radiation emitted by an infrared radiation source other than the infrared radiation sensor. An operation of the graphical user interface navigation button is facilitated by the proximity sensor in response to the navigation mode signal indicating at least a sensing by the infrared radiation sensor of the reflection of the navigation infrared radiation sensor in the navigation direction corresponding to the infrared radiation sensor by the navigation object.
[0004] In a second form of the present invention, a graphical user interface navigation system comprises a graphical user interface navigation button for facilitating a navigation of a graphical user interface and a proximity sensor for facilitating an operation of the graphical user interface navigation button. The proximity sensor includes an infrared radiation emitter, an infrared radiation sensor and an infrared radiation source differentiator. The infrared radiation emitter emits a navigation infrared radiation. The infrared radiation sensor is positioned relative to the infrared radiation emitter to sense a reflection of the navigation infrared radiation in a navigation direction corresponding to the infrared radiation sensor. The infrared radiation source differentiator is operable to provide a navigation mode signal indicative of at least one of a sensing by the infrared radiation sensor of a reflection of the navigation infrared radiation sensor in the navigation direction corresp...

Problems solved by technology

This well known stick-type navigation button is a mechanical based mechanism that is subject to wear and te...

Method used

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embodiment 130

[0021] Referring to FIGS. 2-4, an embodiment 130 of infrared radiation emitter 30 (FIG. 1) includes a light emitting diode 131 and a pulse generator 132 operating light emitting diode 131 to emit pulses of navigation infrared radiation at a pre-defined infrared pulsing frequency. An embodiment of 41 of infrared radiation sensor 40 (FIG. 1) includes a photodiode 141 and a current generator 142 operating photodiode 141 to emit infrared sensing signal IIRS in dependence upon the source or sources of any infrared radiation sensed by photodiode 141.

embodiment 150

[0022] An embodiment 150 of infrared radiation source differentiator 50 includes a current-to-voltage converter 151, a buffer 152, a bandpass filter 153 and a comparator 154. Current-to-voltage converter 151 receives and converts an emission of an infrared sensing signal IIRS from photodiode 141 into an infrared sensing signal VIRS that is buffered by buffer 152. Buffered infrared sensing signal VBIR is filtered by bandpass filter 153 to yield a filtered infrared sensing signal VFIR that is compared to an reference threshold of comparator 154. The comparison of the filtered infrared sensing signal VFIR to the reference threshold results in an enabling of a navigation mode of a graphical user interface navigation button via navigation enabling mode signal VNEM or a disabling of a navigation mode of a graphical user interface navigation button via navigation enabling mode signal VNDM.

[0023] Specifically, as shown in FIG. 2, a conversion factor of converter 151, cut-off frequencies of ...

embodiment 230

[0026] Referring to FIG. 5, an embodiment 230 of infrared radiation emitter 130 (FIGS. 2-4) include a voltage source 232 and a resistor R1 for applying a voltage to a light emitting diode 231, and a voltage pulsing source 233 and a transistor Q1 for operating light emitting diode 231 to emit navigation infrared radiation pulses at a pulsing frequency of pulsing source 233.

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Abstract

A display device comprises a display screen, a graphical user interface navigation button and a proximity sensor including an infrared radiation emitter, an infrared radiation sensor and an infrared radiation source differentiator. The infrared radiation emitter emits a navigation infrared radiation. The infrared radiation sensor is positioned relative to the infrared radiation emitter to sense a reflection of the navigation infrared radiation in a navigation direction corresponding to the infrared radiation sensor. The infrared radiation source differentiator is in electrical communication with the infrared radiation sensor to provide a navigation mode signal indicative of at least one of a sensing by the infrared radiation sensor of a reflection of the navigation infrared radiation in the navigation direction corresponding to the infrared radiation sensor by a navigation object proximate the infrared radiation emitter and the infrared radiation sensor, and a sensing by the infrared radiation sensor of ambient infrared radiation emitted by an infrared radiation source other than the infrared radiation sensor.

Description

BACKGROUND OF THE INVENTION [0001] Currently, most of the commercially available hand-phones use a stick-type navigation button to control and navigate a graphical user interface of the hand-phone as displayed on its display screen. This well known stick-type navigation button is a mechanical based mechanism that is subject to wear and tear in dependence upon the degree of force exerted on the stick-type navigation button by a user of the hand-phone. What is therefore needed is a new and unique navigation button for hand-phones and the like that is less sensitive to wear and tear by a user of the device. SUMMARY OF THE INVENTION [0002] The present invention provides a new and unique proximity sensor based navigation button that provides significant advantages over the mechanical stick-type navigation buttons known in the art. [0003] In a first form of the present invention, a proximity sensor for facilitating an operation of a graphical user interface navigation button comprises an ...

Claims

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Application Information

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IPC IPC(8): G09G5/08
CPCG06F3/0304H03K17/941H04M2250/12H04M1/72583H03K2217/94108H04M1/72469
Inventor CHI-BOON, ONGSIN-HENG, LIM
Owner AVAGO TECH INT SALES PTE LTD
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